Effect of size on magnetic properties of NdMn2O5 nanorods

Chun Chuen Yang, Zhe An Jian, Yi Jung Chen, Yang Yuan Chen

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Abstract

The effects of size on the magnetic properties of NdMn2O 5 nanorods were studied by X-ray diffractometry, transmission electron microscopy, and measurements of magnetic susceptibility and hysteresis. Five types of nanorods with different axial lengths (〈LC〉) x diameters(〈LD〉)-68(36) nm x 31(14) nm, 78(30) nm x 33(8) nm, 95(36) nm x 40(12) nm, 122(48) nm x 54(16) nm, 249(46) nm x 142(36) nm were made. The axial directions of the five types of nanorod were parallel to the axis of the crystal. No particular radial direction is found. All samples crystallize with orthorhombic Pbam symmetry. Upon cooling, only the sample with 〈LC〉 = 249 nm occurs in ferrimagnetic and antiferromagnetic ordering at 80 K and 9 K, respectively. Hysteresis testing reveals a ferrimagnetic domain between 10 K and 50 K only in the 〈LC〉 = nm sample. These tests reveal that the magnetic critical size of NdMn 2O5 is between 〈LC〉 = 249 nm and 122 nm. For memory storage applications, the estimated maximal capacity of NdMn 2O5 nanorods as upstanding pillars is about Gbit/in 2.

Original languageEnglish
Article number2276591
JournalIEEE Transactions on Magnetics
Volume50
Issue number1
DOIs
StatePublished - Jan 2014

Keywords

  • Magnetic property
  • Multiferroic
  • Nanorod
  • Size effect

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